Bought the original purple and yellow Buffalo cycling shirt in 1995 and wore it most days for 1 hour cycling in November to March until a few years ago. It too has several tears that have been sewed with fishing line and all hold good. The (red) fibre pile has squashed a lot and it is no longer good for a -10C ride, but I have other solutions:
I bought the Rab Vapour Rise Smock as a spring-and-autumn solution and this works well to approx 0C, when I switch to a Buffalo Mountain Shirt. This is warmer than the original cycling top, so the vents are very useful.
I bought the Montane Extreme last winter but have not yet actually tried it out. It does seem even thicker and stronger than the Mountain shirt.
I am only a strip of wind and need all the warmth I can get for the first 20 minutes of a winter ride, so these items are vital.
Never yet found I need a base layer if I put the correct top on first, and the fibre pile wicks very well, except under a large camelbak. Crotch strap prevents the ride up and bare kidney problem, but can be harsh with the wrong saddle. I have not removed these straps as I know some people do.
PaulD